Question

PLEASE PLEASE HELP!
A circle has a radius of 8 inches. Find the area of a sector of the circle if the sector has an arc that measures 45°.

2 sq. in.?
8 sq. in.?
16 sq. in.?

Answer 1

Its 8 nches right?

Answer 2

Do you know the formula in finding the are of a sector?

Answer 3

I mean area

Answer 4

You should start by converting the angle 45 into radian..
then formula for area is = 0.5*r^2* theta..

theta is the angle here.. you have the radius too given in the question.. so just plug in the values.

Answer 5

The formula for finding the length of the sector:\[s = r theta\]
For the area of a sector: \[A = (1/2) r ^{2} \theta\]

Answer 6

We work with dragee !

Answer 7

Well, nubeer is right. It must be converted first into radian.

Answer 8

nop @E.ali .. we do these kind of problems in radian.. these formula can be applied when angle is in radian.

Answer 9

We can work with cm and dragee !
Ha ?!:)

Answer 10

@ nubeer ,8 in = cm ?

Answer 11

doesn't matter if it's in cm or in.. it would work for both.. we just have to see for the angle.. if it's in radian or degree.

Answer 12

Thank you guys

Answer 13

but if u wanna know.. 1 inch = 2.5 cm

Answer 14

If we work with Cm shold work with Dragee to and if work with in should work with Radian too !

Answer 15

first of all, let's just make sure we understand the terminology, a sector is basically like a slice of the circle cut from the center out, like a slice of pie
and the measure of the arc is the same as the measure of the central angle